Topographic data play an important role in the hydrodynamic modelling of flood events. An accurate and precise digital elevation model (DEM) with a bathymetric description of the river channel is often required. DEMs can be derived from various data sources, e.g. ground surveying or remote sensing techniques.
The ever-increasing number of floods in the lower reaches of the Dyje and Svratka caused the need to adjust their flows. In the 20th century was the need for dams to be built. The landscape allowed their construction near Vranov at Dyje and Kníničky at Svratka.
As part of the measures aimed at the current issue of mitigating the flood damage caused by the occurrence of a significant drought, attention was focused, among other things, on water transfers between sub-basins of watercourses.
The purpose of the Directive 2007/60/EC on the Assessment and Management of Flood Risks (Flood Directive) is to prevent or reduce negative consequences of floods by preparing flood risk management plans.
Wood is an important part of streams, affecting their hydraulic, morphological and biological features. For the stream management and flood risk reduction it is important to know the characteristics that increase the stability of wood and prevent its flushing at high water stages.